Octopus PM2.5 PM10 Detector Sensor Module User Guide

Introduction

PM 2.5 sensor is a professional sensor for detecting PM2.5 and PM10. It is used for testing the air quality. It has good consistency and high accuracy,which can be accurate to a single unit of digit.

Shipping List

1 x Octopus PM2.5 PM10 Detector Sensor Module

Hardware

Features

• Accuracy：Laser detection, stable and consistent.
• Fast Response: Less than 10 seconds' response to the occasion change.
• Easy to Integrate：Serial port output, with a built-in fan.
• High resolution：Enable to recognise particles with diameters smaller to 0.3um.
• Working Voltage：5V
• Max Working Current：100mA
• Sleep Current：3mA
• Working Temperature：-20-50℃
• Data Output Time：1 second
• Serial Port Data Sending Frequency:1 time per second
• Relative Tolerance：10%
• Product Dimension：71x70x23mm

Application

• Available to be applied to PM2.5 detectors, air purifiers, filtering systems, etc..

Pins Instruction

Pin	Name	Note
1	NC	NC
2	1um	>0.3um particle intensity, PWM output
3	5V	5V power input
4	25um	>2.5um particle intensity, PWM output
5	GND	Ground
6	RXD	Serial port receive RX
7	TXD	Serial port send TX

 

Dimension:

Data Output

Read by PWM

Read by Serial Port

Serial Port Protocol:96008N1.(Speed Ratio 9600, 8 bits, no parity, 1 stop bit)

Serial Port Report Time: 1+0.5 second
Data Frame（10 byte）：header+command+data(6 byte)+checksum+tail
0 header AA
1 command C0
2 data 1 PM2.5 lower byte
3 data 2 PM2.5 high byte
4 data 3 PM10 lower byte
5 data 4 PM10 high byte
6 data 5 0(retain)
7 data 6 0(retain)
8 checksum checksum
9 tail AB
Checksum：Sum from data 1 to data 6.

PM2.5 data content: PM2.5(ug/m3) = ((PM2.5 high byte x 256) + PM2.5 lower byte)/10
PM10 data content：PM10(ug/m3) = ((PM10 high byte x 256) + PM10 lower byte )/10

Example

Arduino

Circuit Connection

Connect PM2.5 GVS to A0 on the Arduino UNO, and connect PM10 GVS to A1 on the Arduino UNO.

Code

#define pm25Pin 14
#define pm10Pin 15

void setup() {
  pinMode(pm25Pin, INPUT);
  pinMode(pm10Pin, INPUT);
  Serial.begin(9600);
}

void loop() {
  Serial.print("PM2.5 = ");
  Serial.println(pulseIn(pm25Pin, HIGH, 1500000) / 1000 - 2);

  Serial.print("PM10 = ");
  Serial.println(pulseIn(pm10Pin, HIGH, 1500000) / 1000 - 2);
}

Micro:bit

Circuit Connection

Connect PM2.5 GVS to P15 on the micro:bit breakout board, and connect PM10 GVS to P16.

 

Code

For the whole code, see this link: https://makecode.microbit.org/_83oYC4DcVc5z

Or you can click Download in the page below to download all example code.

 

Other

Relative Accessary

Freaduino UNO Rev2.2 MB_EFUNO

BBC Micro:bit Board for Coding & Programming

ElecFreaks Micro:bit Breakout Board ( Octopus:bit)

 

https://www.elecfreaks.com/12348.html